Clamping-bolt.



E. LDUNHAM.

Patented June 18, 1918.

3 www/woz lll EVERETT E. DUNHAM, 0F SEATTLE, WASHINGTN.

@alarme-Bom.

menare.

v Application filed January 17, 1918.

Seattle, in the county of King and State of ldlashington,have invented acertain new `V and usetul Improvement. 1n Clanlining-Bolts,`

of which the following is a specification. i

My inwntion relates to improvements in y clamping bolts, yand the objectof my invention, is to provide a claniphigbolt which shall be adapted toclamp an "object'toniporarity against one side` ot' a. plate of metal,as,.t`or instance, to one side of a metalplate comprising a part ot' the-wall ot' the hull ol an iron ship in the process ofbuilding such ship,and which bolt shall embody such features as will adapt it to bedisposed in itsoperative position to extend through said plate andthrough the object to be clamped thereto, by one werkuren' located onone side of said plate, without the aid of any other f workman locatedon the other side et' said plaw. i l

I accomplish this object by devices illustrated in the Aaccompan yingdrawings, Whereini Figure 1 is a View in elevation ot' one side of aclampin bolt embodying my invention which view s ows anA operative partin ele- Vation ot one of its broader sides;

Fig. 2 is a View of' the same in elevation of another side, vwhich Viewshows the saine operativepart in elevation ot' one ot its ,narrowersides; and

Fig. 3 is a View of the saine in crossseo tionen broken line 3, 3 ofFig. 2. n `Referring to the drawings, wherein like numerals indicatelike parte, it is ainetalbolt of circular cross-section, ou portion. ofwhich is provided; with a screw-thread 5, upon which may beoperatively,r disposed' a well known formof a clamping nut, not Shown,and terminates in an end portion 15 that is square in cross-sectionwhereby it is adapted to be. engaged by a wrench, and whose other endportion is biturcated by a slot 6 that extends longitudinally toterminate at a point'l not far distant 'from the in ner end of theserewthread 5 as shown more clearly in Fig. 2. A clamping bar 7, ofrectangular form 1n- Specification of Letters Patent.

l'atentedv lane 18,1918.

serial no. masse. y

is shown by. a circular line in Fig'. land.

indicated by parallel dotted lines in Fig. 2, and Whereon said clampingbar 7 may 4be swung from its position shown bytull lines in Figs. 1 and2 to a position at right angles to the axis of the bolt 4' as indicatedby V.linesformedby dot-s and dashes in Fig. 1.` 1

The clamping bar 7 has one ot' its end portions bifurcated by a narrowslot J that extends to a point near the pivot 8 as shown by full linesin Fig. 2, and as indicated by the line 10.v formed by dots andby'another line 1l formed by dots und dashes `in Fig. l.

Extending through the members oit the bifurcatedportion of theclainping'bar 7, at a point near the inner end ot the slot 9 and nearone of its edges, a pin l2 indicated by parallel dotted lines in Fig.il, the same pin 12 being indicated at each of two different operativepositions by a circular dotted line in Fig. 1.

Airticulatcai to the pin 12 within the slot 9 is one end ot. a still hutsprng'y actuating wire rod 13 that projects from said slot *9 andextends thence through a longitudinal hole 14 that extends from `theinner end ot the slot 6 through and out of the serewthreaded endportion. ot bolt i to point distant therefrom, which wire rod 13 may beAmanipulated to more in endwise directions to swingr the clamping bar 'Tto and from its position shown by full lines in Figs. 1 and 2 and .itsposition shown by lines formed by dots and dashes in Fig. 1.

To utilize a clamping bolt embodyinginy invention in -the mannerhereinoefore de scribed, the clamping bar 7 is disposed par allel withthe axis of the holt 4: in the pd' sition indicatedby` Fig. 2, and theworkman, being located on that side ot' plate to which an object 1s tobe clamped, inserts the clamping member 7 and the adjacent end portionof thel bolt t throu h a hole in said object and through a ho e thatextends through the plate, to which the object is to be clamped, forsuch' distancethat the inner end of the clamping bar Z will pass be yondthe other side of said-plate and. there upon the Wire 13 is pushedinwardlyl to swing the clamping barlY into a position that is at rightangles to the bolt Il whereupon the bolt 4. is pulled back until theadjacent edge portion of the clamping bar 7 vrests againstiet againstthe out/er suraceof the object to be clamped securely to holdersaidobject in its required position. During the operation of screwing thenut on the screw-threads the bolt may be pre- 5 Vented from turning byapplying a suitable tool, as another wrench, to the squared end portion5, which will project outwardly from the nut.

When it is desired to remove the object from the side of a plate the nutis removed m the screw-threaded portion of the bolt v and thereupon thebolt-'is pushed inwardly yfor afdistance to permit theclarnping bar 7 tobe swung into its position parallel with the axis of the boltinrespons'e to pulling l the Wire rod 13 outwardly and with the clampinbar 7 in such position the bolt may be who] y withdrawn to release theobject clam ed.

` at'I claim is: A elampin bolt of the class described one portion of Wich is provided with a screwthread and another portion of which isbifurcated by a slot that extends from one vtends ma p :heladera of itsends to a point near thev inner end of said screw-threadLsaid bolt beingprovided with a hole that extends longitudinally from the inner end ofsaid slot throughout the remainder of its length; a clamping barpivotally mounted in the slot between the members of the bifurcatedportion of said cylindrical portion, said clamping bar bein providedwith a slot that exane parallel with its broader sides from one of itsends to a point near its pivot; and a wire rod having one of its endsarticulated with said clamping bar atI u point within thel slot thereof.and disposed to extend from said point through said longitudinaldisposed hole for a distance beyond the outer end thereof to'adapt it tobe munipulated to move in endwise directions to cause said clamping barto swing on its pivot to dierent an lar positions.

In Witness whereo I hereunto subscribe my name this 6th day of January,A. D., 1918.

EVERETT E.' D UNHAM.

